Fuel retailers have been warned they face fines of up to $100 million for price gouging as the temporary fuel excise cut comes to an end and petrol prices rise. Treasurer Jim Chalmers has written to the Australian Competition and Consumer Commission (ACCC) asking for increased scrutiny of fuel prices to ensure they weren’t being artificially inflated. “The ACCC has the powers that they need to fine … servos and suppliers up to $100 million per offence, and so servos and suppliers are on notice,” he told ABC’s RN on Monday. Dr Chalmers said it wasn’t the government’s intention to reintroduce the discount on the fuel excise, which has wiped revenue from the budget’s bottom line. Some truck drivers had reported downing tools in anticipation of diesel costs rising because their customers could not afford to pay higher prices.